c++ - Method not a static member of a class

Question

Hello guys i had this error while i was compiling

error:'unisgned int vehicle::accelerate' is not a static member of 'class vehicle'

Any idea how to fix this?

Header file

class vehicle
{
    public:
    enum Switch
    {
     SWITCH_ON=0,
     SWITCH_OFF
                };
     vehicle();
    ~vehicle();

    bool powerSwitch(Switch );
    unsigned int accelerate(unsigned int );
    unsigned int decelerate(unsigned int );
    bool isMoving();
    unsigned int getSpeed();
    unsigned int setSpeed(unsigned int);

private:
unsigned int speed;
bool moving;
};

vehicle.cpp

unsigned int vehicle::accelerate(amount)
{

if(moving==true;){
speed+=amount;
 }

 return speed;

 }

Answer 1

You are missing the type in the parameter list:

unsigned int vehicle::accelerate(unsigned int amount)
{
  .....
}

Answer 2

As you have declared:

unsigned int accelerate(unsigned int );

So you must implement:

unsigned int vehicle::accelerate(unsigned int amount)
{
  //...

The type needs to be given again at this point.

Answer 3

The error might be somewhere else, where you're trying to access the accelerate member not using the operator -> or ., but ::, apart from forgetting the type of the parameter